From the idea to the settled bill.
Tell it roughly, get it precisely.
Destination, dates, who is going and what you like. Sevi returns a day-by-day plan with a time against every stop, what it is likely to cost, and notes on the things that catch people out. Weight your interests and the plan shifts with them — more food, less walking, whatever you actually want from the week.
Every plan is editable by hand as well. Add a stop, move one, delete the thing you were never going to do.
One plan, everyone on it.
Share a trip with a code. Anyone who joins can edit it, and their changes reach the rest of you — a stop moved on somebody's phone in another timezone shows up on yours without a refresh, with a note saying who did it.
The assistant works on shared trips too, so the person who never opens planning apps can still say “push Friday's dinner later” and have it happen.
Nobody has to be the accountant.
Log what you spend as you spend it. Split evenly, by share, or item by item when only three of you had the wine. Sevi keeps the running balance and tells you the shortest set of payments that clears it.
Groups work without a trip attached, so the same thing handles roommates and a weekend away.
And the rest of it
Hourly, five days, air quality, morning nudge
What the trip should cost before you commit
Food, sights and cash machines around you
Live rates, and a tip calculator beside it
Home and away, side by side
The day everything is shut
For the moment the map stops helping
Where to go, when it is best